What percentage of men are left handed?

Approximately 12% of men are left-handed, and 9% of women are left-handed, according to one of the larger studies on the topic.

Most studies conclude that males are more likely to be left-handed than females, and this appears to apply regardless of the culture or society.

The difference is not huge, though. One major study has pegged male left-handedness at about 11.6% and female 8.6%; others indicate respective percentages of 13% and 11%, 14% and 10%, etc.

A 2008 meta-analysis of 144 other studies found that men are, on average, about 23% more likely to be left-handed than women, which is roughly consistent with these results. The commonly-quoted notion that men are twice as likely to be left-handed than women is demonstrably false and of unknown provenance.

http://www.rightleftrightwrong.com/issues_sex.html

About 11 percent of the American population is left-handed (with slightly more men than women).
http://www.slate.com/id/2147842

Left-handedness is more common among men than women. It is estimated that left-handedness is around 20% more common among men than women.
( Papadatou-Pastou, "Sex differences in left-handedness: a meta-analysis of 144 studies". Psychological Bulletin. 134)

https://en.wikipedia.org/wiki/South_Paw